There's been a lot of talk about going to Mars lately, talk that includes plans for human settlements on Mars, which doesn't sound like a very good idea considering what sci-fi has taught us about off-world colonization.

But do you know what's an even worse idea? Trying to settle on Venus, where life would literally feel like hell thanks to the sulfur dioxide clouds in the sky, intense heat and ten-mile-thick toxic cloud that covers the surface.